NASA's figures state that fossil evidence shows that "man like" life has been around for about half a million years, but modern man as we know him has only been around for about a hundred thousand years. A mere drop in the ocean when you consider the Earth has been around for about 4.5 billion years.
No one knows anything about anything & it just sucks. We will never actually know why we were here, who put us here, and how long its actually been since ppl lived here. Sheesh